Talking machine



C. F. HJERPE TALKING MACHINE May 5, 1925. 1,537,045

Filed Aug, ll. 1922 4 Sheets-Sheet 1 H15 atto: req

May 5, 1925. 1,537,045

C. F. HJERPE TALKING MACHINE bFiled Aug, 11, 1922Y 4 Sheets-Sheet 2 /0 2a a5 4 27 l p 25 6' f4 60 /5 E 5 5 m f gnvewfo Car/ FILI/Erpe HIJ Gironi,

May 5, 1925,

C. F. HJERPE TALKING MACHINE Filed Aug. l1, 1922 4 Sheets-Sheet 5 6 /a ffy. 4

4f, ai 45 ffy. 5

HIS i @Noting c. F. HJr-:RPE

TALKING MACHINE May 5, 1925.

Filed Aug, 11, 1922 4 Sheets-Sheet 4 noemt o1',

H15 @Hozmul talking machines and more particularly to Patented May 5, 192-5.

UNITEDA STATES i CARL F. HJERPE, 0F JAMESTOWN, NEW YORK.

TALKING MACHINE.

Applicationl nieu August 11, 1922. serial No. 581,215.

To all lwhom it may concern: Be it known that I, CARL F. HJERPE, a citizen of the United States, residing at the city of Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Talking Machines, of which the following, taken in connection with the accompanyin drawings, is a specification.

his invention relates to improvements in the type of machine provided with a plurality of amplifiers.

One object of this invention is to provide a talking machine equipped with two inverted amplifiers connected to each side of a specially constructed sound boX, the structure of the amplifiers including movable par-ts so that two independent motions, hori- Zontal and vertical, will be made with the same ease as with one/amplifier, while at the same time the sound channels or sound passages in both amplifiers are continuous and lead independently of each other, one from each side of the sound box to the mouths of the amplifiers.

For a full, clear and exact description of a talking machine embodying this invention with two amplifiers reference is made to the following specification and'to the accompanying drawings which form a part thereof, and in which- Figure l is a front elevation of the talking machine embodying one form of my improved construction, partly in section.

Fig. 2 is a transverse sectional view of 'the machine illustratedin Fig. 1.

Fig. 3 is a plan view thereof with the cover removed.

Fig. 4 is an enlarged sectional View taken along line 4--4 of Fig. 3.

Fig. 5 is an enlarged sectional view taken` vthe upper part 14 of the cabinet to about along the line 5 5 of Figs. 3' and 4.

Fig. 6 is a plan view partly in section-of the two tone arms, elbows, sound tubes, sound boX and pivot block.

Fig. 7 is a sectional View taken along line 7--7 of Fig. 6.

Fig. 8 is a side view ofthe plates which hold the elbows together. A

Fig. 9 is a side View of the damper in each sound tube.

Fig. 10 is a similar View of the damper taken at right angles to Fig. 9.

Fig. 11 is a sectional fragmentary View of the sound tube, showing the damper inside. of the sound tube.

Fig. 12 is a plan view of ashort piece of tubing with a semi-circular notch in the upper side, said tubing forming a sleevevon thc sound tubes.

Fig. 13 is a plan view of the sound tube with the tubing or sleeve of Fig. 12 withdrawn, showing the long notch into which the knob on the damperpasses and also the shoulder against which the short tubing of Fig. 12 fits when the damper is in place as shown in F ig. 11.

Fig. 14 is a plan view of the sound tube l showing the short tubing of Fig. 12 in place on the sound tube, the damper being omitted.

Fig. 15 is a side view on a smaller scale of the pivot block to which the two tone arms are fastened, one on each side of the pivot block, two projections on each side being formed to guide the tone arms into position and, Y

Fig. 16 is a front view on a smaller scale of the pivot-block.

Referring to the drawings, the reference with the knobs 54 bywhich the damper is regulated as will be described below.

lThe upper sections 13a of the amplifiers inside the cabinet run straight down from halfl way between the upper part 14 and the lower part 15-where a horizontal partition board 16 made of several plies of vencer glued together is mounted. lThrough the board 16 are formed passages 17 slightly conical and coinciding with the contour of the amplifie-rs.

IThe lower sections 13b of the amplifiers 13 run from the under side of the horizontal partition board 16 with a slight curving downward and forward toward the bottom and the front of the lower part of the Cabinet, and at the same time the lower` sections 13b 'widen gradually until they reach the front of the cabinet, forming ovals'wit-h the longer axis vertical at the mouths 13. Sections 13b of the ampliers are made from plastic'composition.

The upp'erends of the sectlons 13 are xed in position by collars 21 whlch are held by screws in the stri 18, whlle the lowerends are held in position by similar collars 22. Y

Mounted on the board 19 is a block 23 in\ which are formed sound conduits 24, each being in alinement with an amplifier so as to form a continuous sound channel from the receiving` ends of the conduits `to the mouths of the A amplifiers. The receiving 'ends of the condults are horizontal, the

vconduits being so formed that the end of .one is below and faces the end of the other.

Between and connected to the conduits is a pivot block 25 which carries at each side a tone arm 26. The block is swivelled on the block 23 by means of arms 27 which project from the pivot block 25, and terminating Vabove and below the block 24, are secured thereto byscrews 28. A In the pivot block 25 are formed curved passages 29 which connect the ends of the tone arms 26 to the mouths of the conduits 24.

As shown particularly in Fig. 4, a. gasket 30 is mounted on a shoulder31 surrounding the'mouth of each conduit 24 to re-j vent any leakage'of sound from the join ers of the pivot blockand conduit block which joinders must permit an oscillation of the movable pivot.. lock relative to the stationary conduit block. The' ends of the tone arms 26 seat in recesses 32 at the ends of the passages 29 and are held in position by bolts 33 through ears 34 projecting from the tone arms and block. Thus the pivot block isallowed to oscillate in unison with the tone arms without interfering with the connection from the arms tothe conduits, and hence the sound Waves pass freely from the tone arms to `the mouths of the amplifiers. Y At the outer ends of the tone arms 26 are secured elbows 35, each of which has a lug 36 projecting inwardl in alinement. The contacting surfaces o the tone arms and elbows are correspondingly flanged so that the connections between them are leak proof and the elbows are so held by means of a member-37 attached to both lugs 36. The member 37 comprises a block 38 to the opposite sides of which are secured plates 39.' When the elbows are joined, the member 37 is placed with the block 38 between the lugs and the plates 39 extending at each side. In the plates are formed bolt holes 40 which, when the parts are assembled, lie

Vat each side of the slots or enlarged holes 41 of the lugs 36. Bolts 42 passed through the vholes 40 and slots 41 clamp the plates 39 against the lug and hold the elbows 35 against the tone arms 26. By reason of the slots 41 the relation of the lugs 36 with regard to the plates 39 can be regulated as desired.

Carried by the elbows 35v are the sound which surrounds the stem of a damper 51.

The damper 51 comprises a circular plate 52 mounted on a stem 53 and having a knob 54 at thecenter end of the stem by which the damper may be controlled. At the lower edge of the plate 52 is formed a tip `55 which seats in a ocket 56 in the wall of the tube 43. A colar 57 on the stem coacts with the tip 55 to hold the damper in positlon. The dempers above described control 'the passage of sound waves through the elbows so that the volume desired at anytime can be obtained.

Mounted in a flanged opening 58 in the assembly board 19 is the motor board 59 by which thek motor (not shown) is supported in the usualway and on which is rotatably mounted the turn table 60. In order to prevent the communication of .the motor vibration to the assembly board 19 the motor board. 59 is separated from the assembly board by strips 61 of soft rubber.

The sound box 62 which is carried by the sound tubes 43 is completely enclosed by the casin walls'63," 64 from which projects the hol er 72 for the needle 82.

/At the Vcenter of each wall 63 and 64 is formed a flanged opening 84 in which the ends of the sound tubes 43 are fixed by set screws 854 l Y This sound box is set forth in detail iii my copending application, Serial No. 644,- 292, filed June 8, 1923, as a division of this application.

In order to assist in supporting the elbows 35, sound tubes 43 and sound box 62 and to prevent the needle 82 from leaning too heavily upon the record a support 86 is 'provided between the tone arms 26 to which is secured one end of a s ring strip 87. The other end of the strip 87) is fixed under the plates 39 and the block 38 of the member 37. Thus any excessive tendency of these parts to rotate relative to the tone arms will" be opposed. A set screw'88 mounted in the support 86 and bearing against the strip 87 i 'may be used to enhance or decrease the ac shown).

tion of the strip as desired. plate 89 carried by the support 86 is" intended to actuate an automatic stop mechanism (not The parts attached to the tone arms may be removed if desired and replaced by a specially constructed loud speaking receiver for radio music.

In front of the amplifiers 13 are provided doors90 preferably of grille work backed by screening. 'Ihese doors are made in sections hinged together so that they .can be opened to any desired amount allowmg the emission of the sound Waves from the amplifiers. v The doors 91 of the record cmpartment 12 are similarly made so the cabinet will have a uniform appearance.

It will be noted that the sound box, sound tubes and elbows move vertically by reason of the connection between the elbows and the tone arms and further that they move horizontally by reason of the connection between the pivot block-'and the conduits and further that thesemovements do not in any way interfere with the vpassage of sound waves to the amplifiers. Moreover, all the passages traversed by the sound waves are curved so that they present no acute angles which would reduce the volume of sound1 Thus the tone waves flowing from the amplifiers are pure and mellow but can be effectively regulated by means of the damper mechanism above described.

Under ordinary conditions a soft needle can be relied upon to reproduce the desired tone which will be materially enhanced by the use of a loud needle, in excess of the volume derived from the conventional machine. By the use of the construction above set forth there will be provided two distinct and independent series of sound waves which will not intermingle with or counteract each other, so that the waves emerging from the amplifiers produce a volume ofatone of great purity and power.

While one embodiment only has been shown, and described, I am not to be limited thereby since it will be understood that other modifications may be made without departing from the spirit and scope of my invention as set forth in the following claims.

Having thus set forth my invention what I claim as new and for which I desire the protection of Letters Patent is 1. In a talking machine, a sound box, a

pivot block having two independent passages therethrough, independent tone arms connecting one end of eachpassage with said sound box and independent sound conduits mounted upon said block each in alinement with the other end of each passave.

t2. In atalking machine, a sound box, a pivot block having two independent passages therethrough, one passage terminating at thetop and side of said block, and the other passage terminating at the bottom and opposite side of said block, independent tone arms leading from said sound box and secured to the sides of said block in alinement with the passage openings therein and independent sound conduits pivotally connected to the top and bottom-of said block in alinement with the passage openings therein whereby said block and tone arms can be moved relatively to said sound.

conduits in a horizontal plane.

\\3. In a talking machine, two sound conduits, the receiving ends of which are in parallel planes, one directly below and facing the other, a block pivotally mounted upon land between the receiving ends of said .and said sound box can be moved relatively to said inner sections of said tone arms, said pivot block and said conduits in a vertical plane.

4. In a talking machine, sound tubes, each provided with a shoulder near one end and having .a notch from the end of each sound tube to said shoulder, a short tubingl forming a sleeve mounted on the end of said tube and resting against said shoulder, a damper in said tube having a stem projecting through the notch in said tube, said sleeve having la notch for said stem, a tip on said damper, a pocket in said tube for said tip, whereby said tip forms a pivot for said damper and said sleeve holds said damper in place.

5. In a talking machine, a pivot block, curved brackets integral with said block, a screw threaded in the end of each bracket and having a non-thread portion, said screws-being on opposite sides of said pivot block and in alignment with each other to form a pivotal support for said block.

6. In a talking machine, a sound box, a pivot block, sound conduits between the receiving ends of which said block is located,

tone arms connecting said sound box to said loo sound conduits, brackets pivotally mounted upon said conduits, and a pivot'l block between said conduits rigidly supported by said brackets.

8. In a talking machine, a sound box, a

pivot block, two tone arms connecting said box to said block, two sound conduits conducting the sound waves from said pivot block, one of said sound conduits being connected to the upper face of said block and the other being connected to the lower face of said block.

9. In a talking machine, yan assembly; board, a pivot block, two sound conduits conducting the sound waves from lsaid block, one of said conduits running from the upper face of said block to said board.

10. In a talking machine, an assembly board, a pivot block, two sound conduits conducting the sound waves from said block, one of said conduits running from the lower face of'said block to said board.

l1. In a. talking machine, an assembly board having separated passages therethrough, an integral block mounted upon said board, separate conduits formed in said block connecting with said rate tone arms and means connecting one of said arms with one. of said conduits and the other of said arms with the other of said conduits.

In testimony whereof I have affixed my signa-ture in the presence of two witnesses.

CORINNE V. SWANsoN, RICHMOND S. HAYES.

passages sepa- 

